Ruling (2)(a) in Opinion 2218 is to be read as follows:
Mecistocephalus Newport, 1843 and Pachymerium Koch, 1847 (Chilopoda): current usage conserved by designation of Mecistocephalus punctifrons Newport, 1843 as the type species of Mecistocephalus Newport, 1843 (BZN 66: 93–94)," The Bulletin of Zoological Nomenclature 66(2), 202, (1 June 2009). https://doi.org/10.21805/bzn.v66i2.a14